Gamma Decay Contents: What it is Whiteboard

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Gamma Decay Contents: What it is Whiteboard

description

g. Gamma Decay Contents: What it is Whiteboard. Gamma Decay:. 239 94 Pu 239 94 Pu + . Nucleus has energy levels Energy of transition emitted as a high energy photon Usually after a beta or alpha decay Many energies possible Stopped by meters of lead Used for food irradiation. - PowerPoint PPT Presentation

Transcript of Gamma Decay Contents: What it is Whiteboard

Page 1: Gamma Decay Contents: What it is Whiteboard

Gamma Decay

Contents:•What it is

•Whiteboard

Page 2: Gamma Decay Contents: What it is Whiteboard

TOC

23994Pu 239

94Pu + Gamma Decay:

Nucleus has energy levelsEnergy of transition emitted as a high energy photonUsually after a beta or alpha decayMany energies possible Stopped by meters of leadUsed for food irradiation

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Whiteboards: Gamma Decay

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TOC

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W

Parent mass = 239.054238 uProduct mass = 239.052157 uMass defect = parent - products = 0.002081 uEnergy of radiation = (0.002081u)(931.5 MeV/u) = 1.94 MeV

23994Pu --> 239

94Pu +

239.054238 --> 239.052157What is the energy of the gamma emitted?

1.94 MeV

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Mass of 3.92 MeV = (3.92 MeV)/(931.5 MeV/u) = 0.004208266 uExcited parent is more massive than this by that amountParent mass = 245.065484 + .004208266 u = 245.069692 u

24596Cm --> 245

96Cm +

???.?????? --> 245.065484What is the excited mass of the parent, if a 3.92 MeV gamma photon is emitted?

245.069692